While idly looking out of the school window, Kii sees what looks like a little girl hitting a teacher, causing his head to explode violently.
The series began in 2012 from Kentaro Satou in Weekly Shonen Champion as his first main work under the name Mahou Shoujo of the End.
Unfortunately, its not a dream, and he arrives to find the creepy little girl repeatedly saying “magical” as she slaughters his friends and classmates.